From patchwork Fri May 19 20:05:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 684691 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37213C7EE26 for ; Fri, 19 May 2023 20:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229782AbjESUFi (ORCPT ); Fri, 19 May 2023 16:05:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229568AbjESUFh (ORCPT ); Fri, 19 May 2023 16:05:37 -0400 Received: from mail-wm1-x32c.google.com (mail-wm1-x32c.google.com [IPv6:2a00:1450:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A28DA101 for ; Fri, 19 May 2023 13:05:35 -0700 (PDT) Received: by mail-wm1-x32c.google.com with SMTP id 5b1f17b1804b1-3f4ad71b00eso23352775e9.2 for ; Fri, 19 May 2023 13:05:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shruggie-ro.20221208.gappssmtp.com; s=20221208; t=1684526734; x=1687118734; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=unGGcWMXSxlIkISO/XPChAGC5INeHx+xymr7hphOHTk=; b=k5Guw/07AnhDpxjKB8UcXAAmZWcQ5O3JowQVJ8laPyua71EN/rsYssN/IFPaFpkVpI TNQ3Unj6O43cAdOO+OlJb/KWDnruigOlVvcsww9kNmV0PUazy0v2IbPDWbOOOPXT46IK gb2tn8Hf/7Bg0Lu5ehkHUxiwM3yKMAO1UQ2MwV2DKEkEB946eY0I3G1Gxks2hY+Ydn7W ecXUt3qg+NzSrGI0M2vHUQcH7ryHNXhU1MzhxtbmTvYxXhHlz6txRv/tGxamizDCnjzp i2DRuPB/RPO5+nSINoDpkwQxIm/dOb0kmar0qY5Mm/EYGnDK2PDeXlgtmjuPcYIxJN/+ M8uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684526734; x=1687118734; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=unGGcWMXSxlIkISO/XPChAGC5INeHx+xymr7hphOHTk=; b=gPqjNiv7PvGPrBIic4vMN5+0U5yK7tBIcB7Z4hIg2qBG6t7kIjxMjSEc4T3GzkIAOY 2fuwfsyX4o7A3iLbkslWXGnjxJm6EtULTjrhsJhr1e18J4cRrgAXjbs06QvChHNbrBvw 3vje3C6ZH06JBOVMvO/fWFUMK7SbYET00Wc8A2F4Ok/iI8Otf5VAS98oN9jLLsfAzTiD l5Vv2WcuEr/+mMoM/fqhn+MyuVJZd/ozTHR9NL1+cMhOmClO6MtS8RJdZsikwEk81v2L B829ak471HtDbfkH4VOH6ynv8CTlFYgRD4N6RLhOA2+y3N53r11xYonxjdkzVgAL07gn tYag== X-Gm-Message-State: AC+VfDxWriunIn0SvcnIpA268OmDHn9TqzTEcVcbF+RCMqecO6p/bk/F XGyD0G5289ZnJ8OzZ+u09eThzge6CfL4Tc9YGU8CzQ== X-Google-Smtp-Source: ACHHUZ7ga4CZxLiQQKfdmi4Xqh4DykUfMWEgzKKffEXW7eHm0kD86vFODcQqOLeT733JRNm32EOAfA== X-Received: by 2002:a1c:7303:0:b0:3f1:9acf:8682 with SMTP id d3-20020a1c7303000000b003f19acf8682mr2044341wmb.17.1684526733947; Fri, 19 May 2023 13:05:33 -0700 (PDT) Received: from localhost.localdomain ([188.27.132.2]) by smtp.gmail.com with ESMTPSA id q3-20020adfea03000000b002fe96f0b3acsm6220329wrm.63.2023.05.19.13.05.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 13:05:33 -0700 (PDT) From: Alexandru Ardelean To: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: lee@kernel.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, deller@gmx.de, Yannick Fertre , Philippe CORNU , Alexandru Ardelean Subject: [PATCH 1/2] backlight: gpio_backlight: add new property default-brightness-level Date: Fri, 19 May 2023 23:05:19 +0300 Message-Id: <20230519200520.10657-1-alex@shruggie.ro> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Yannick Fertre Add new property to set a brightness by default at probe. Reviewed-by: Philippe CORNU Signed-off-by: Yannick Fertre Signed-off-by: Alexandru Ardelean Reviewed-by: Daniel Thompson --- Link to original patch: https://github.com/STMicroelectronics/linux/commit/c4067d7bd883c6fa14ffd49892c4ce663cdafe98 drivers/video/backlight/gpio_backlight.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c index 6f78d928f054..d3fa3a8bef4d 100644 --- a/drivers/video/backlight/gpio_backlight.c +++ b/drivers/video/backlight/gpio_backlight.c @@ -53,6 +53,7 @@ static int gpio_backlight_probe(struct platform_device *pdev) struct backlight_device *bl; struct gpio_backlight *gbl; int ret, init_brightness, def_value; + u32 value; gbl = devm_kzalloc(dev, sizeof(*gbl), GFP_KERNEL); if (gbl == NULL) @@ -93,7 +94,11 @@ static int gpio_backlight_probe(struct platform_device *pdev) else bl->props.power = FB_BLANK_UNBLANK; - bl->props.brightness = 1; + ret = device_property_read_u32(dev, "default-brightness-level", &value); + if (!ret && value <= props.max_brightness) + bl->props.brightness = value; + else + bl->props.brightness = 1; init_brightness = backlight_get_brightness(bl); ret = gpiod_direction_output(gbl->gpiod, init_brightness);